I canot save the videos from Blink camera

Hello,
I am trying to save the videos produced from my Blink camera as shown at the end of this document: https://www.home-assistant.io/integrations/blink/

I adapted the automation to Node-red(which I preffer), and also added it to automations.yaml just to test.
But it does not save videos.
It did save the video one time, but it was corrupted and does not save them anymore.
Here is the NR flow:

[{"id":"9b27c782.0e0ac","type":"inject","z":"f26fbf34.385be8","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":190,"y":340,"wires":[["e4065d85.0548b"]]},{"id":"d8d4c9ad.f83c98","type":"server-state-changed","z":"f26fbf34.385be8","name":"Movimiento blink? si","server":"a0018f6b.a40b3","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"binary_sensor.blink_puerta_enfrente_motion_detected","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"on","halt_if_type":"str","halt_if_compare":"is","outputs":2,"output_only_on_state_change":true,"x":120,"y":420,"wires":[["bf875fcb.a864e"],[]]},{"id":"e4065d85.0548b","type":"api-call-service","z":"f26fbf34.385be8","name":"Guardar video blink","server":"a0018f6b.a40b3","version":1,"debugenabled":false,"service_domain":"blink","service":"save_video","entityId":"","data":"{\"name\":\"puerta enfrente\",\"filename\":\"/config/www/blink_video2.mp4\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":390,"y":340,"wires":[["1b1c2cbf.dfeda3","59f303b4.508a1c","e698b8b.c288d48"]]},{"id":"e698b8b.c288d48","type":"api-call-service","z":"f26fbf34.385be8","name":"Send blink video","server":"a0018f6b.a40b3","version":1,"debugenabled":false,"service_domain":"telegram_bot","service":"send_video","entityId":"","data":"{\"file\":\"/config/www/blink_video2.mp4\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":760,"y":340,"wires":[[]]},{"id":"bf875fcb.a864e","type":"delay","z":"f26fbf34.385be8","name":"","pauseType":"delay","timeout":"90","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":300,"y":420,"wires":[["e4065d85.0548b"]]},{"id":"1b1c2cbf.dfeda3","type":"debug","z":"f26fbf34.385be8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":790,"y":460,"wires":[]},{"id":"59f303b4.508a1c","type":"api-call-service","z":"f26fbf34.385be8","name":"Notificacion de video!","server":"a0018f6b.a40b3","version":1,"debugenabled":false,"service_domain":"notify","service":"telegram_bot","entityId":"","data":"{\"title\":\"*Movimiento enfrente*\",\"message\":\"Hay alguien (o algo) enfrente.\\nEste es el video\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":820,"y":400,"wires":[[]]},{"id":"a0018f6b.a40b3","type":"server","z":"","name":"NewHASSIO","legacy":false,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true}]

The debug node for it does not really tell me anything.

Any ideas?
Thanks